53613240 has 128 divisors (see below), whose sum is σ = 174726720. Its totient is φ = 13107200.

The previous prime is 53613233. The next prime is 53613247. The reversal of 53613240 is 4231635.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (53613233) and next prime (53613247).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 53613240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53613247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83320 + ... + 83960.

Almost surely, 2^53613240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53613240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87363360).

53613240 is an abundant number, since it is smaller than the sum of its proper divisors (121113480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53613240 is a wasteful number, since it uses less digits than its factorization.

53613240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 53613240 is about 7322.1062543506. The cubic root of 53613240 is about 377.0717685440.

Adding to 53613240 its reverse (4231635), we get a palindrome (57844875).

The spelling of 53613240 in words is "fifty-three million, six hundred thirteen thousand, two hundred forty".